somatomammotropin

[ sō-măt′ə-măm′ə-trōpĭn, sō′mə-tə- ]

n.

A peptide hormone biologically related to growth hormone but produced by the normal placenta and by certain neoplasms.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.